Calculation models with different bulkhead forms of double cylindrical shell are established by the ANSYS. The vibration and acoustic radiation from the shell caused by longitudinal vibration of propeller are calculated by FEM/BEM. Two bulkhead forms that plane shape and curved face are considered, and then the effects of curved bulkhead with different convex surface directions or different curvatures on shell acoustic radiation are researched. The following conclusions on noise reduction are obtained, the curved bulkhead is better than plane shape, the convex surface direction pointed to propeller side is better than pointed to the header and the bulkhead curvature is the larger the better.
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